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    <script>
        //求数组[2,6,1,77,52,25,7]中的最大值
        var arr = [2,6,1,77,52,25,7];
        var max = arr[0];
        for(var i = 1; i < arr.length;i++) {
            if(arr[i] > max){
                max = arr[i];
            }
        }
        console.log('最大值是：' + max);
         //求数组[2,6,1,77,52,25,7]中的最小值
         var min = arr[0];
         for(var i = 1; i < arr.length;i++) {
            if(arr[i] < max){
                max = arr[i];
            }
        }
        console.log('最小值是：' + max);
    </script>
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